PRACTICE ITUse the worked example above to help you solve this problem. An Eskimo returning from a successfulfishing trip pulls a sled loaded with salmon. The total mass of the sled and salmon is 50.0 kg, and theEskimo exerts a force of 1.30 x 10² N on the sled by pulling on the rope.(a) How much work does he do on the sled if the rope is horizontal to the ground (0 = 0° in thefigure) and he pulls the sled 5.40 m?J(b) How much work does he do on the sled if 0 = 30.0° and he pulls the sled the same distance?(Treat the sled as a point particle, so details such as the point of attachment of the rope make nodifference.)J(c) At a coordinate position of 5.40 m, the Eskimo lets up on the applied force. A friction force of50.0 N between the ice and the sled brings the sled to rest at a coordinate position of 10.40 m.How much work does friction do on the sled?JEXERCISEHINTS: GETTING STARTED I I'M STUCK!Suppose the Eskimo is pushing the same 50.0-kg sled across level terrain with a force of 55.0 N.(a) If he does 4.55 x 10² J of work on the sled while exerting the force horizontally, through whatdistance must he have pushed it?m(b) If he exerts the same force at an angle of 50.0° with respect to the horizontal and moves thesled through the same distance, how much work does he do on the sled?J Sledding Through the YukonEXAMPLE 5.1GOAL Apply the basic definitions of work done by aconstant force.PROBLEM An Eskimo returning from a successfulfishing trip pulls a sled loaded with salmon. The totalmass of the sled and salmon is 50.0 kg, and the Eskimoexerts a force of 1.20 x 10² N on the sled by pulling onthe rope. (a) How much work does he do on the sledif the rope is horizontal to the ground (0 = 0° in thefigure) and he pulls the sled 5.00 m? (b) How muchwork does he do on the sled if 0 30.0° and he pulls thesled the same distance? (Treat the sled as a pointparticle, so details such as the point of attachment of the rope make no difference.) (c) At a coordinateposition of 12.4 m, the Eskimo lets up on the applied force. A friction force of 45.0 N between the ice andthe sled brings the sled to rest at a coordinate position of 18.2 m. How much work does friction do on thesled?=SOLUTION(A) Find the work done when the force is horizontal.Use the proper equation, substitutingthe given values.teSTRATEGY Substitute the given values of F and Ax into the basic equations for work.Use the proper equation, with Freplaced by fk.tamgAn Eskimo pulling a sled with a rope at an angle to thehorizontal.(B) Find the work done when the force is exerted at a 30° angle.Use the proper equation, againsubstituting the given values.W = F Ax = (1.20 x 10² N) (5.00 m) = 6.00 × 10² J=W = (Fcos 0) d = (1.20 × 10² N)(cos 30.0°) (5.00 m)5.20 x 10² J(C) How much work does a friction force of 45.0 N do on the sled as it travels from a coordinate positionof 12.4 m to 18.2 m?Wfric = FxAx = fk(xf = X₁)

Name: PRACTICE ITUse the worked example above to help you solve this proble
Uploaded: 2024-03-20T06:57:25.000Z
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Description: PRACTICE ITUse the worked example above to help you solve this problem. An Eskimo returning from a successfulfishing trip pulls a sled loaded with salmon. The total mass of the sled and salmon is 50.0 kg, and theEskimo exerts a force of 1.30 x 10² N

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